The Weber Genesis II LX S-340 Natural Gas Grill, Stainless Steel is built for backyard cooks who want convenience, capacity, and dependable grilling performance without the hassle of propane tanks or charcoal refills. Once connected to a natural gas line, this grill gives you a constant fuel supply, which means no more interruptions in the middle of dinner and no more scrambling for a replacement tank during a weekend cookout or holiday gathering.
For homeowners who already have natural gas service—or are planning to install it—the Genesis II LX S-340 can become one of the most practical upgrades you make to your outdoor cooking area. While there may be an upfront cost to have a gas line professionally installed, the long-term convenience is hard to beat. Once the setup is complete, you simply turn the knobs, ignite the burners, and start cooking.
One of the biggest advantages of this grill is its generous cooking space. With 513 square inches of primary grilling area plus an additional 156 square inches on the warming rack, the Genesis II LX S-340 offers plenty of room to prepare meals for family dinners, backyard gatherings, and holiday cookouts. Whether you’re grilling burgers for a crowd, slow-cooking racks of ribs, or roasting a turkey, the large cooking surface gives you the flexibility to handle multiple foods at once.
This grill is also designed for versatility. You can use the main grilling area for steaks, burgers, chicken, ribs, or vegetables, while the warming rack keeps buns, cooked meats, or side items hot until it’s time to serve. The included side burner adds even more convenience, allowing you to steam corn on the cob, heat sauces, boil potatoes, or prepare side dishes without making repeated trips back into the kitchen.
Constructed in stainless steel, the Genesis II LX S-340 offers a polished, high-end appearance that looks great on a patio, deck, or outdoor kitchen setup. But the stainless-steel finish is not just about appearance—it also adds durability and helps the grill stand up to outdoor use season after season.
Overall, the Weber Genesis II LX S-340 Natural Gas Grill is built for grillers who want a spacious, attractive, and highly convenient gas grill that can handle everyday meals as well as larger entertaining occasions. It combines the trusted Weber name with the ease of natural gas cooking, making it a strong option for anyone looking to elevate their backyard BBQ experience.
GS4 High-Performance Grilling System
One of the standout features of the Weber Genesis II LX S-340 Natural Gas Grill is the advanced GS4 Grilling System, a technology designed to improve reliability, performance, and ease of use. Weber developed this system after decades of research and feedback from real grill owners, combining more than 30 years of design innovation into a single integrated cooking system.
The GS4 system consists of four key components that work together to create consistent heat, dependable ignition, and easier cleanup after every cookout. These components include the Infinity Ignition, high-performance burner tubes, Flavorizer bars, and the grease management system. Each element plays a role in ensuring that the grill heats evenly, lights quickly, and maintains steady temperatures across the entire cooking surface.
The Infinity Ignition provides a reliable electronic ignition system that lights the burners quickly with the push of a button, eliminating the frustration of repeated attempts to start the grill. The high-performance burner tubes are designed to deliver consistent gas flow along the length of the grill, helping to distribute heat evenly so that food cooks properly from edge to edge.
Another important part of the GS4 system is Weber’s well-known Flavorizer bars. These angled metal bars sit above the burners and serve two purposes. First, they help distribute heat evenly across the grill surface. Second, they catch drippings from meat and vaporize them into flavorful smoke that circulates back into the food, enhancing that classic grilled taste.
Finally, the grease management system helps keep the grill cleaner and safer by directing grease away from the burners into an easy-to-remove drip tray. This reduces flare-ups and makes post-cookout cleanup much simpler.
Together, these four components create a grilling system that is easy to assemble, simple to operate, and quick to clean, making backyard barbecuing far more convenient. The GS4 system is one of the major reasons the Genesis II line stands out from many other gas grills on the market.
Lighted Handle and Illuminated Control Knobs
The Genesis II LX S-340 also includes thoughtful features designed for convenience and nighttime grilling. One of the most popular additions is the LED-illuminated handle, which lights up the cooking surface whenever the grill lid is opened. This bright lighting allows you to clearly see the food as it cooks, even after sunset.
As an energy-saving feature, the handle light automatically shuts off when the lid is closed, helping conserve power while still providing excellent visibility when you need it.
In addition to the handle lighting, the grill includes illuminated control knobs that glow when activated. With a simple push of a button, the knobs light up, allowing you to easily adjust burner settings in low-light conditions.
These lighting features make the Genesis II LX S-340 especially convenient for evening cookouts, late-night grilling sessions, or backyard parties that continue after dark. Instead of struggling to see what you’re cooking, the built-in LED lighting ensures you can monitor your food and adjust temperatures with confidence, keeping the grilling experience enjoyable from start to finish.
Features and Specifications
- 513 Square Inches of Primary Grilling Space
- 156 Square Inch Warming Rack
- Flavorizer Bars
- 43,500 BTUs main grill and 12,000 BTUs Side Burner
- Lit Handles and Control Knobs
- i-Grill 3 Bluetooth Digital Thermometer
- 33 x 38 x 52 Inches and 145 pounds
- The grease management system makes it simple to clean up
- Night proof lighted handles and control knobs
- Large 513 square inch grilling area
- Solid stainless-steel construction
- A few complained of parts damaged in shipment but stated that customer service replaced broken pieces
- Assembly instructions are not clear
Customer Reviews and Ratings
The stainless-steel Weber Genesis II LX S-340 Natural Gas Grill offers plenty of cooking space—so much, in fact, that you may find yourself looking for more food to fill it. Whether you’re grilling hot dogs, burgers, ribs, roasts, or sautéing vegetables like onions and peppers, the grill’s over 600 square inches of cooking area, combined with the Tuck-Away warming rack, provides ample room for preparing meals for family and friends. The grill’s tight-sealing lid also allows it to function almost like an oven, making it possible to cook large items such as a 15- to 20-pound turkey with ease.
While this model delivers excellent performance as a natural gas grill, those who need even more cooking capacity may want to consider the Weber Genesis II LX S-440, which offers a larger grilling area and higher BTU output—ideal for bigger families or larger gatherings.
Based on 143 verified Amazon customer reviews, this Weber Genesis II model holds an average rating of 4.5 out of 5 stars, with 88% of buyers giving it either four or five stars. Many reviewers noted that they had owned multiple Weber grills in the past—often beginning with the classic Weber Original Kettle—and chose this model as an upgrade.
Customer feedback highlights both performance and convenience. Some typical comments include:
- “Great BBQ with all the bells and whistles.”
- “It’s an expensive grill, but I absolutely love using it.”
- “This replaced my ten-year-old Weber Genesis Silver.”
- “Heats up quickly and delivers strong, consistent heat.”
- “Amazon even offered professional assembly, which made setup incredibly easy.”
Several reviewers also recommend purchasing a large silicone grill mat to help protect the grill and make cleanup even easier after cooking.
Final Thoughts
Although the Weber Genesis II LX S-340 Natural Gas Grill is a substantial grill—measuring nearly 50 inches wide even with the side table folded down and weighing about 145 pounds—it remains surprisingly easy for one person to move thanks to its large, durable caster wheels. The grill is built with impressive stability and durability, giving it the solid feel of a long-term investment.
Designed with both performance and convenience in mind, this grill offers virtually everything you could want in a premium backyard BBQ. From its spacious cooking area and reliable ignition system to its sturdy construction and thoughtful features, the Genesis II LX S-340 is built to deliver consistent results for years to come.
For anyone looking for a high-quality natural gas grill that combines power, space, and durability, this model stands out as an excellent choice. With proper care, it’s the kind of grill that could easily become the last BBQ grill you’ll ever need to buy, providing many seasons of enjoyable outdoor cooking.